Numericals On Electrostatics (including Coloumbs Law)

[srijit92]

1. In hydrogen atom the distance between electron(e=1.6*10^-19 C)(Mass of electron=9.1*10^-31 kg) & proton(Mass Of proton=1.7*10^23 C) is 5.3*10^-11 m.



2. Calculate the electrical and gravitational forces between 2 particles



3. Can't do the problem... Please help!

 

[jdwood983]

Welcome to PF!

What equations do you have for the gravitational force and the electric force?

 

[jdwood983]

So you know that

$$F_{gravity}=G\frac{m_1m_2}{r^2}$$

so then you are given both masses, the distance apart and the gravitational constant, so this should be a straight-forward "enter the variables" type problem.

But what about the $F_{electric}$, what is the equation for that? (Hint: it has a similar form as the gravitational force)